<template>
  <div class="home-category" @mouseleave="Id = null">
    <!-- 轮播图左侧边栏 -->
    <ul class="menu">
      <li
        v-for="item in bannerLeftData"
        :key="item.id"
        :class="{ active: Id && Id === item.id }"
        @mouseenter="handleGetThisOne(item)"
      >
        <RouterLink to="/">{{ item.name }}</RouterLink>
        <!-- 获取到数据时的模板 -->
        <template v-if="item.children.length">
          <RouterLink to="/" v-for="i in item.children" :key="i.id">
            {{ i.name }}
          </RouterLink>
        </template>
        <!-- 没获取到数据时的模板 -->
        <template v-else>
          <XtxSkeleton
            animated="fade"
            width="60px"
            height="18px"
            bg="rgba(255,255,255,0.2)"
            style="margin-right: 5px"
          ></XtxSkeleton>
          <XtxSkeleton
            animated="fade"
            width="60px"
            height="18px"
            bg="rgba(255,255,255,0.2)"
          ></XtxSkeleton>
        </template>
      </li>
    </ul>
    <!-- 轮播图左侧边栏详细信息 -->
    <div class="layer">
      <h4>
        {{ thisone.goods ? "分类" : "品牌" }}推荐
        <small>根据您的购买或浏览记录推荐</small>
      </h4>
      <!-- 其他栏目 -->
      <ul v-if="thisone.goods">
        <li v-for="item in thisone.goods" :key="item.id">
          <RouterLink to="/">
            <img :src="item.picture" alt="" />
            <div class="info">
              <p class="name ellipsis-2">{{ item.name }}</p>
              <p class="desc ellipsis">{{ item.desc }}</p>
              <p class="price"><i>¥</i>{{ item.price }}</p>
            </div>
          </RouterLink>
        </li>
      </ul>
      <!-- 品牌 -->
      <ul v-if="thisone.brands">
        <li class="brand" v-for="item in thisone.brands" :key="item.id">
          <RouterLink to="/">
            <img :src="item.picture" alt="" />
            <div class="info">
              <p class="place">
                <i class="iconfont icon-dingwei"></i>{{ item.place }}
              </p>
              <p class="name ellipsis">{{ item.name }}</p>
              <p class="desc ellipsis-2">{{ item.desc }}</p>
            </div>
          </RouterLink>
        </li>
      </ul>
    </div>
  </div>
</template>

<script>
import { useStore } from "vuex";
import { computed, ref } from "vue";
import { getBrandData } from "../../api/home";

export default {
  name: "HomeCategory",
  setup() {
    // 存放鼠标进入侧边栏获取当前栏目所有信息
    let thisone = ref([]);
    // 存储当前鼠标所在的栏目id
    let Id = ref(null);

    const handleGetThisOne = (item) => {
      // console.log(item);
      thisone.value = item;
      Id.value = item.id;
    };

    return {
      bannerLeftData: getLeftcategoryData(),
      thisone,
      handleGetThisOne,
      Id,
    };
  },
};

// 将获取轮播图左侧边栏数据封装成一个函数
function getLeftcategoryData() {
  const store = useStore();
  // category模块对象
  let result = store.state.category;
  // 左侧导航栏添加屁品牌栏目
  let brand = ref({
    id: "brand",
    name: "品牌",
    children: [{ id: "child-brand", name: "推荐品牌" }],
    brands: [],
  });

  // 获取品牌数据
  getBrandData(6).then((res) => {
    brand.value.brands = res.result;
    // console.log(brandData.value);
  });

  // 给children数组截取前两条数据
  return computed(() => {
    let list = result.list.map((item) => ({
      ...item,
      children: item.children ? item.children.slice(0, 2) : [],
    }));

    list.push(brand.value);

    return list;
  });
}
</script>

<style scoped lang="less">
.home-category {
  width: 250px;
  height: 500px;
  background: rgba(0, 0, 0, 0.8);
  position: relative;
  z-index: 99;

  .menu {
    li {
      padding-left: 40px;
      height: 50px;
      line-height: 50px;

      &:hover {
        background-color: @xtxColor;
      }

      a {
        margin-right: 4px;
        color: #fff;

        &:first-child {
          font-size: 16px;
        }
      }
    }

    .active {
      background-color: @xtxColor;
    }
  }

  .layer {
    width: 990px;
    height: 500px;
    background: rgba(255, 255, 255, 0.8);
    position: absolute;
    left: 250px;
    top: 0;
    display: none;
    padding: 0 15px;

    h4 {
      font-size: 20px;
      font-weight: normal;
      line-height: 80px;

      small {
        font-size: 16px;
        color: #666;
      }
    }

    ul {
      display: flex;
      flex-wrap: wrap;

      li {
        width: 310px;
        height: 120px;
        margin-right: 15px;
        margin-bottom: 15px;
        border: 1px solid #eee;
        border-radius: 4px;
        background: #fff;

        &:nth-child(3n) {
          margin-right: 0;
        }

        a {
          display: flex;
          width: 100%;
          height: 100%;
          align-items: center;
          padding: 10px;

          &:hover {
            background: #e3f9f4;
          }

          img {
            width: 95px;
            height: 95px;
          }

          .info {
            padding-left: 10px;
            line-height: 24px;
            width: 190px;

            .name {
              font-size: 16px;
              color: #666;
            }

            .desc {
              color: #999;
            }

            .price {
              font-size: 22px;
              color: @priceColor;

              i {
                font-size: 16px;
              }
            }
          }
        }
      }

      li.brand {
        height: 180px;

        a {
          align-items: flex-start;

          img {
            width: 120px;
            height: 160px;
          }

          .info {
            p {
              margin-top: 8px;
            }

            .place {
              color: #999;
            }
          }
        }
      }
    }
  }

  &:hover {
    .layer {
      display: block;
    }
  }
}
</style>
